CN116771833A - Textured surface of flat-head V-shaped groove and friction pair - Google Patents
Textured surface of flat-head V-shaped groove and friction pair Download PDFInfo
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- CN116771833A CN116771833A CN202311012613.2A CN202311012613A CN116771833A CN 116771833 A CN116771833 A CN 116771833A CN 202311012613 A CN202311012613 A CN 202311012613A CN 116771833 A CN116771833 A CN 116771833A
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- 241000755266 Kathetostoma giganteum Species 0.000 title claims abstract description 36
- 238000009826 distribution Methods 0.000 claims description 15
- 230000002035 prolonged effect Effects 0.000 claims description 2
- 239000010687 lubricating oil Substances 0.000 abstract description 3
- 230000003993 interaction Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 9
- 238000004364 calculation method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 230000002068 genetic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D2069/004—Profiled friction surfaces, e.g. grooves, dimples
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses a flat-head V-shaped groove textured surface and a friction pair, which comprise a surface and a plurality of groove textures concavely arranged on the surface, wherein the surface is provided with a movement direction, the groove textures are provided with a flat head part and two side edge parts, the side edge parts are provided with a front end positioned at the front in the movement direction and a rear end positioned at the rear in the movement direction, the two side edge parts gradually extend to the flat head part from the rear end to the front end, and the flat head part is arranged in a way of extending perpendicular to the movement direction. According to the invention, the groove texture is designed into a flat-head V shape, when the lubricating oil moves along the movement direction under the drive of the surface, a large-area high-pressure area and a large pressure peak value can be generated on the flat head, and a small cavitation area can be generated at the rear ends of the two side edges, so that the area of a low-pressure area is effectively reduced, and meanwhile, the two opened side edges can avoid the interaction of the high-pressure area and the low-pressure area between the adjacent groove textures.
Description
Technical Field
The invention relates to the technical field of friction pairs, in particular to a textured surface of a flat-head V-shaped groove and a friction pair.
Background
Early tribology theory suggested that surface roughness resulted in friction, the smoother the surfaces in contact with each other, the less wear. In general, reducing the surface roughness may reduce the coefficient of friction, but the coefficient of friction of the surface obtained after superfinishing increases dramatically. In recent years, a great number of scholars' researches show that a series of micro-morphologies with certain distribution rules and dimensions are processed on the surfaces in contact with each other, so that the tribological performance of the contact surfaces can be improved. The micro-morphology of changing the tribological property of the material surface by using different processing methods to manufacture patterns with certain shapes, sizes and arrangements on the material surface is called surface texture. The surface texture is a novel and obvious surface modification technology due to the good antifriction and wear-resistant characteristics.
In the field of mechanical engineering, after the surface texture of the friction pair surface is processed, the bearing capacity, antifriction and wear resistance, friction coefficient, running stability, reliability, service life and the like of the friction pair are greatly influenced, positive effects can be generated, and the performance parameters can be invalid or even worsened. The parameters of the texture, such as shape, size, distribution and the like, are mainly determined, so that the parameters of the surface texture of the friction pair are required to be reasonably designed, the tribological performance of the friction pair is improved, and the service life of the mechanical parts is prolonged. The traditional texture design method mainly adopts a trial-and-error method, and the texture parameters with the best performance index are selected from the texture parameters which are limited and are imagined by people in a test or numerical calculation mode. At present, the surface texture of the friction pair mainly adopts regular shapes such as circles, ellipses, triangles, rectangles, diamonds and trapezoids. The round pit has simple shape, high processing efficiency and better tribological performance, and is widely applied.
While these regular-shaped textures are widely used, these shapes are not optimal. In hydrodynamic lubrication conditions, hydrodynamic effects from surface texture play a decisive role in oil film bearing capacity, but hydrodynamic effects from regular-shape texture are not strongest. Therefore, the shape of the texture needs to be optimally designed, so that the texture can generate the maximum oil film bearing capacity, and the lubricating performance of the friction pair is improved.
Disclosure of Invention
The invention aims to provide a textured surface with flat-head V-shaped grooves and a friction pair, so as to solve the technical problem that the conventional regular-shaped texture cannot enable the surface to generate larger oil film bearing capacity and cannot improve the lubricating performance of the friction pair.
The above object of the present invention can be achieved by the following technical solutions:
the invention provides a flat-head V-shaped groove textured surface, which comprises a surface and a plurality of groove textures concavely arranged on the surface, wherein the surface is provided with a movement direction, the groove textures are provided with a flat head part and two side edge parts, the side edge parts are provided with a front end positioned at the front in the movement direction and a rear end positioned at the rear in the movement direction, the two side edge parts gradually approach each other from the rear end to the front end of the side edge parts to the flat head part, and the flat head part is arranged in an extending way perpendicular to the movement direction.
In an embodiment of the present invention, a plurality of the groove textures are arranged along the movement direction to form a first groove texture distribution structure.
In an embodiment of the present invention, a plurality of the groove textures are arranged along a direction perpendicular to the moving direction to form a second groove texture distribution structure.
In an embodiment of the present invention, the movement direction is a linear direction or a rotational direction.
In an embodiment of the present invention, the rear end of the side edge portion has a tip structure.
In an embodiment of the present invention, the two side edges have outer edges disposed away from each other, and the outer edges of the two side edges can be extended to form a front included angle, and the angle of the front included angle is 30 ° to 60 °.
In an embodiment of the present invention, the two side edges have inner edges disposed close to each other, and the inner edges of the two side edges intersect to form a rear included angle, and the angle of the rear included angle is 45 ° to 90 °.
In an embodiment of the invention, the outer contour of the groove texture is provided with eighteen characteristic points, the eighteen characteristic points are sequentially connected through eighteen line segments, and the dimensionless length of the line segments is 0.125-0.3271.
In an embodiment of the present invention, a rectangular coordinate system is established with the first feature point as an origin, and dimensionless coordinate values of eighteen feature points in the rectangular coordinate system are respectively: (0,0), (0.2713,0), (0.5736,0.1250), (0.7984,0.2500), (1,0.3750), (1,0.5000), (1,0.6250), (0.7907,0.7500), (0.5969,0.8750), (0.3256,1), (0,1), (0.2403,0.8750), (0.4729,0.7500), (0.5814,0.6250), (0.7132,0.5000), (0.5659,0.3750), (0.4419,0.2500), (0.2248,0.1250).
In an embodiment of the present invention, a rectangular coordinate system is established with the first feature point as an origin, and dimensionless coordinate values of eighteen feature points in the rectangular coordinate system are respectively: (0,0), (0.2500,0), (0.5000,0.1250), (0.7500,0.2500), (1,0.3750), (1,0.5000), (1,0.6250), (0.7500), (0.5000,0.8750), (0.2500,1), (0,1), (0.2000,0.8750), (0.4000,0.7500), (0.6000,0.6250), (0.8000,0.5000), (0.6000,0.3750), (0.4000,0.2500), (0.2000,0.1250).
In an embodiment of the invention, the depth of the groove texture is 5-20 μm; the surface density of the groove texture is 20% -40%.
The invention also provides a friction pair comprising the flat-head V-shaped groove textured surface.
The invention has the characteristics and advantages that:
the flat V-shaped groove textured surface and the friction pair are characterized in that the groove texture is approximately V-shaped by gradually extending the two side edge parts close to each other, a flat head part which is arranged perpendicular to the moving direction is formed at the front ends of the two side edge parts, so that the flat head is approximately V-shaped, when lubricating oil moves on the surface along the moving direction under the driving of the surface, on one hand, a large-area high-pressure area and a large pressure peak value can be generated at the flat head part, on the other hand, a small cavitation area can be generated at the rear ends of the two side edge parts, so that the area of a low-pressure area is effectively reduced, and on the other hand, the two side edge parts which are simultaneously opened can avoid the mutual influence of the high-pressure area and the low-pressure area between the adjacent two groove textures.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic illustration of the outer contour of a flat-headed "V" shaped groove texture in accordance with the present invention.
FIG. 2 is a white light micro-topography of a flat-headed "V" shaped groove texture in accordance with the present invention.
Fig. 3 is a pressure distribution cloud of a flat-headed "V" shaped groove texture in a first embodiment of the present invention.
Fig. 4 is a pressure distribution cloud of a flat-headed "V" shaped groove texture in a second embodiment of the present invention.
Fig. 5 is a pressure distribution cloud of prior art circular groove texture.
Fig. 6 is a cross-sectional profile view of a flat-headed "V" shaped groove texture in accordance with the present invention.
Fig. 7 is a schematic structural view of a linear motion friction pair according to the present invention.
Fig. 8 is a schematic structural view of a friction pair for rotational movement in the present invention.
Fig. 9 is a plan view of the outer contour of the truncated V-shaped groove texture in the first embodiment of the present invention.
Fig. 10 is a plan view of the outer contour of a truncated "V" shaped groove texture in a second embodiment of the present invention.
Fig. 11 is a graph comparing friction performance of the first embodiment of the present invention with that of the prior art.
FIG. 12 is a graph comparing friction performance of a second embodiment of the present invention with that of the prior art.
In the figure:
1. a surface; 2. groove texture; 21. a side edge portion; 211. a front end; 212. a rear end; 213. an outer edge; 214. an inner edge; 215. a connecting edge; 216. a tip structure; 22. a flat head.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one
As shown in fig. 1 to 2, the present invention provides a flat-headed "V" shaped groove textured surface, comprising a surface 1 and a plurality of groove textures 2 concavely provided on the surface 1, the surface 1 having a movement direction F, the groove textures 2 having a flat head 22 and two side edges 21, the side edges 21 having a front end 211 located forward in the movement direction F and a rear end 212 located rearward in the movement direction F, the two side edges 21 extending gradually closer to each other from the rear end 212 toward the front end 211 thereof to the flat head 22, the flat head 22 extending perpendicularly to the movement direction (i.e., along direction T).
As shown in fig. 3 and 4, the flat-head V-shaped groove textured surface of the present invention is formed by gradually extending two side edge portions 21 close to each other to make the groove texture 2 substantially V-shaped, and by forming a flat head portion 22 extending perpendicular to the moving direction at the front end 211 of the two side edge portions 21 to be substantially flat-head V-shaped, when the lubricating oil moves on the surface 1 along the moving direction under the driving of the surface 1, on one hand, a large-area high-pressure area and a large-pressure peak value can be generated at the flat head portion 22, on the other hand, a small cavitation area can be generated at the rear end 212 of the two side edge portions 21, so as to effectively reduce the area of the low-pressure area, and on the other hand, the two side edge portions 21 which are simultaneously opened can avoid the interaction of the high-pressure area and the low-pressure area between the two adjacent groove textures 2.
In addition, as shown in comparison of fig. 3 and 4 with fig. 5, the area of the high-voltage region formed near the circular groove texture in the prior art is significantly smaller than the area of the high-voltage region formed near the flat head 22 of the flat head "V" -shaped groove texture 2 in the present invention, and the high-voltage peak value of the high-voltage region in the prior art is also significantly lower than the high-voltage peak value of the high-voltage region in the present invention.
Specifically, as shown in fig. 6, the depth of the groove texture 2 is 5 μm to 20 μm; the surface density of the groove texture 2 is 20% -40%. Wherein the plurality of groove textures 2 are arranged along the movement direction F to form a first groove texture 2 distribution structure. Wherein the plurality of groove textures 2 are arranged along a perpendicular direction T of the motion direction F to form a second groove texture 2 distribution structure.
As shown in fig. 1, in order to further reduce the cavitation zone generated by the rear end 212 of the side portion 21 to further reduce the area of the low pressure zone, in the embodiment of the present invention, the rear end 212 of the side portion 21 has a tip structure 216. Specifically, the tip structure 216 is disposed toward the rear of the direction of motion F. The two side edge portions 21 have outer side edges 213 disposed away from each other and inner side edges 214 disposed close to each other. The rear end 212 of the inner side edge 214 and the rear end 212 of the outer side edge 213 are connected by a connecting edge 215, the outer side edge 213 and the inner side edge 214 are each arranged extending obliquely in the movement direction F, the connecting edge 215 is arranged extending in the movement direction, and the rear end 212 of the connecting edge 215 is connected with the rear end 212 of the outer side edge 213 to form a tip structure 216.
As shown in fig. 1, the front ends 211 of the outer edges 213 of the side edges 21 are connected to both ends of the butt portion 22. The outer edges 213 of the side portions 21 are elongated to intersect to form a forward included angle α, which is 30 ° to 60 °. The inner edges 214 of the two side portions 21 intersect to form a rear included angle β, which is 45 ° to 90 °.
As shown in fig. 7 and 8, the flat "V" shaped groove textured surface of the present invention can be applied as a friction surface to a friction pair.
In some embodiments of the invention, as shown in fig. 7, the direction of motion F is a straight direction u. Specifically, the plurality of groove textures 2 are distributed in a rectangular array; wherein the plurality of groove textures 2 are uniformly distributed at intervals along the length direction of the surface 1 to form a first groove texture distribution structure; wherein the plurality of groove textures 2 are uniformly arranged at intervals along the width direction of the surface 1 to form a second groove texture distribution structure.
In other embodiments of the present invention, as shown in fig. 8, the direction of motion F is the direction of rotation ω. Specifically, the surface 1 is generally an annular plane, and the plurality of groove textures 2 are distributed in a radial array; wherein the plurality of groove textures 2 are uniformly distributed along the circumferential direction of the surface 1 at intervals to form a first groove texture 2 distribution structure; wherein the plurality of groove textures 2 are uniformly arranged along the radial direction of the surface 1 at intervals to form a second groove texture 2 distribution structure.
As shown in fig. 9 and 10, in the embodiment of the present invention, the outer contour of the groove texture 2 has eighteen feature points, and the eighteen feature points are sequentially connected through eighteen line segments to form the outer contour of the groove texture 2, wherein the dimensionless length of the line segments is 0.125 to 0.3271.
Specifically, the shape of the flat-head V-shaped groove texture on the surface contact friction pair is optimally designed based on a hybrid optimization algorithm of a genetic algorithm and a sequence quadratic programming algorithm. The calculation domain of the optimal design is a sector area or a square area, the design variable is the coordinate value of eighteen characteristic points for determining the texture shape, the objective function (fitness) of the optimal design is the oil film bearing capacity in the calculation domain, and the objective of the optimal design is to find the coordinate value of the eighteen characteristic points so that the oil film bearing capacity in the calculation domain is maximum. N individuals are randomly generated, and the n individuals form a population, and each individual contains coordinate values of eighteen characteristic points for determining the specific shape of the flat-head V-shaped groove texture. And obtaining a population of the texture shape through a genetic algorithm, then searching a local optimal solution of the texture shape by using a sequence quadratic programming algorithm, and alternately using the genetic algorithm and the sequence quadratic programming algorithm, wherein the oil film bearing capacity is gradually increased until the oil film bearing capacity in a calculation domain keeps a certain evolution algebra unchanged, stopping iteration, and outputting dimensionless coordinate values of eighteen characteristic points for determining the specific shape of the flat-head V-shaped groove texture.
As shown in fig. 9, in the first embodiment of the present invention, a rectangular coordinate system is established with the first feature point as the origin o, wherein the x-axis of the rectangular coordinate system is disposed along the moving direction, and the y-axis is disposed perpendicular to the moving direction; the dimensionless coordinate values of the eighteen feature points in the rectangular coordinate system are as follows:
first characteristic point p 1 The coordinate value of (0, 0), the second feature point p 2 The coordinate value of (0.2500,0), the third characteristic point p 3 Coordinate value of (0.5000,0.1250), fourth feature point p 4 The coordinate value of (5) is (0.7500,0.2500), the fifth feature point p 5 The coordinate value of (5) is (1,0.3750), the sixth feature point p 6 The coordinate value of (5) is (1,0.5000), the seventh feature point p 7 The coordinate value of (5) is (1,0.6250), the eighth feature point p 8 The coordinate value of (5) is (0.7500), the ninth feature point p 9 The coordinate value of (5) is (0.5000,0.8750), the tenth feature point p 10 The coordinate value of (5) is (0.2500,1), the eleventh feature point p 11 The coordinate value of (1, 0) and the twelfth feature point p 12 Coordinate value of (0.2000,0.8750), thirteenth feature point p 13 Coordinate value of (0.4000,0.7500), fourteenth feature point p 14 The coordinate value of (5) is (0.6000,0.6250), the fifteenth feature point p 15 Coordinate value of (0.8000,0.5000), sixteenth feature point p 16 Coordinate values of (2)(0.6000,0.3750) seventeenth feature point p 17 The coordinate value of (5) is (0.4000,0.2500), the eighteenth feature point p 18 The coordinate value of (5) is (0.2000,0.1250).
Specifically, eighteen line segments p formed by sequentially connecting eighteen characteristic points 1 p 2 ，p 2 p 3 ，p 3 p，p 4 p 5 ，p 5 p 6 ，p 6 p 7 ，p 7 p 8 ，p 8 p 9 ，p 9 p 10 ，p 10 p 11 ，p 11 p 12 ，p 12 p 13 ，p 13 p 14 ，p 14 p 15 ，p 15 p 16 ，p 16 p 17 ，p 17 p 18 ，p 18 p 1 Is a straight line 0.2500,0.2795,0.2795,0.2795,0.1250,0.1250,0.2795,0.2795,0.2795,0.2500,0.2358,0.2358,0.2358,0.2358,0.2358,0.2358,0.2358,0.2358, respectively.
As shown in fig. 10, in the second embodiment of the present invention, dimensionless coordinate values of eighteen feature points in a rectangular coordinate system are as follows:
first characteristic point p 1 The coordinate value of (0, 0), the second feature point p 2 The coordinate value of (0.2713,0), the third characteristic point p 3 Coordinate value of (0.5736,0.1250), fourth feature point p 4 The coordinate value of (5) is (0.7984,0.2500), the fifth feature point p 5 The coordinate value of (5) is (1,0.3750), the sixth feature point p 6 The coordinate value of (5) is (1,0.5000), the seventh feature point p 7 The coordinate value of (5) is (1,0.6250), the eighth feature point p 8 The coordinate value of (5) is (0.7907,0.7500), the ninth feature point p 9 The coordinate value of (5) is (0.5969,0.8750), the tenth feature point p 10 The coordinate value of (5) is (0.3256,1), the eleventh feature point p 11 The coordinate value of (1, 0) and the twelfth feature point p 12 Coordinate value of (0.2403,0.8750), thirteenth feature point p 13 Coordinate value of (0.4729,0.7500), fourteenth feature point p 14 Coordinate values of (2)(0.5814,0.6250) fifteenth feature point p 15 Coordinate value of (0.7132,0.5000), sixteenth feature point p 16 Coordinate value of (0.5659,0.3750), seventeenth feature point p 17 The coordinate value of (5) is (0.4419,0.2500), the eighteenth feature point p 18 The coordinate value of (5) is (0.2248,0.1250).
Specifically, eighteen line segments p formed by sequentially connecting eighteen characteristic points 1 p 2 ，p 2 p 3 ，p 3 p，p 4 p 5 ，p 5 p 6 ，p 6 p 7 ，p 7 p 8 ，p 8 p 9 ，p 9 p 10 ，p 10 p 11 ，p 11 p 12 ，p 12 p 13 ，p 13 p 14 ，p 14 p 15 ，p 15 p 16 ，p 16 p 17 ，p 17 p 18 ，p 18 p 1 Is 0.2713,0.3271,0.2572,0.2372,0.1250,0.1250,0.2438,0.2306,0.2987,0.3256,0.2709,0.2640,0.1655,0.1816,0.1932,0.1761,0.2505,0.2572, respectively.
As shown in fig. 11 and 12, compared with the circular groove textured surface in the prior art, the oil film bearing capacity of the flat-head V-shaped groove textured surface of the invention is obviously improved, and the friction coefficient is obviously reduced. And comparing the first embodiment and the second embodiment of the present invention, it is known that by adjusting the positions of part of the feature points, the performance of the groove texture 2 is further optimized, the oil film bearing capacity is further improved, the friction coefficient is further reduced, and the friction force is also reduced.
Second embodiment
The present invention also provides a friction pair comprising a flat-headed "V" shaped groove textured surface, as shown in connection with fig. 7 and 8. The textured surface of the flat-head V-shaped groove forms a friction surface of the friction pair. The specific structure, working principle and beneficial effect of the textured surface of the flat-head 'V' -shaped groove in the present embodiment are the same as those of the textured surface of the flat-head 'V' -shaped groove in the first embodiment, and are not described herein.
The foregoing is merely a few embodiments of the present invention and those skilled in the art may make various modifications or alterations to the embodiments of the present invention in light of the disclosure herein without departing from the spirit and scope of the invention.
Claims (12)
1. A flat-head "V" shaped groove textured surface, comprising a surface and a plurality of groove textures recessed in the surface, the surface having a direction of motion, the groove textures having a butt portion and two side portions, the side portions having a front end located forward in the direction of motion and a rear end located rearward in the direction of motion, the two side portions extending from the rear end thereof toward each other gradually to the butt portion, the butt portion extending perpendicular to the direction of motion.
2. The flat-headed "V" -shaped groove textured surface of claim 1,
the groove textures are distributed along the moving direction to form a first groove texture distribution structure.
3. The flat-headed "V" -shaped groove textured surface of claim 2,
the groove textures are distributed along the direction perpendicular to the moving direction to form a second groove texture distribution structure.
4. The flat-headed "V" -shaped groove textured surface of claim 2,
the movement direction is a straight line direction or a rotation direction.
5. The flat-headed "V" -shaped groove textured surface of claim 1,
the rear end of the side edge part is in a tip structure.
6. The flat-headed "V" -shaped groove textured surface of claim 1,
the two side edge parts are provided with outer side edges which are far away from each other, the outer side edges of the two side edge parts can be prolonged to form a front included angle, and the angle of the front included angle is 30-60 degrees.
7. The flat-headed "V" -shaped groove textured surface of claim 1,
the two side edge parts are provided with inner side edges which are close to each other, the inner side edges of the two side edge parts are intersected to form a rear included angle, and the angle of the rear included angle is 45-90 degrees.
8. The flat-headed "V" -shaped groove textured surface of claim 1,
the outer contour of the groove texture is provided with eighteen characteristic points, the eighteen characteristic points are sequentially connected through eighteen line segments, and the dimensionless length of each line segment is 0.125-0.3271.
9. The flat-headed "V" -shaped groove textured surface of claim 8,
establishing a rectangular coordinate system by taking a first characteristic point as an origin, wherein dimensionless coordinate values of eighteen characteristic points in the rectangular coordinate system are respectively as follows: (0,0), (0.2713,0), (0.5736,0.1250), (0.7984,0.2500), (1,0.3750), (1,0.5000), (1,0.6250), (0.7907,0.7500), (0.5969,0.8750), (0.3256,1), (0,1), (0.2403,0.8750), (0.4729,0.7500), (0.5814,0.6250), (0.7132,0.5000), (0.5659,0.3750), (0.4419,0.2500), (0.2248,0.1250).
10. The flat-headed "V" -shaped groove textured surface of claim 8,
establishing a rectangular coordinate system by taking a first feature point as an origin, wherein the ordinate axes of the rectangular coordinate system extend along the vertical direction of the moving direction, and the dimensionless coordinate values of eighteen feature points in the rectangular coordinate system are respectively as follows: (0,0), (0.2500,0), (0.5000,0.1250), (0.7500,0.2500), (1,0.3750), (1,0.5000), (1,0.6250), (0.7500), (0.5000,0.8750), (0.2500,1), (0,1), (0.2000,0.8750), (0.4000,0.7500), (0.6000,0.6250), (0.8000,0.5000), (0.6000,0.3750), (0.4000,0.2500), (0.2000,0.1250).
11. The flat-headed "V" -shaped groove textured surface of claim 1,
the depth of the groove texture is 5-20 mu m; the surface density of the groove texture is 20% -40%.
12. A friction pair comprising a flat-headed "V" shaped groove textured surface as defined in any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311012613.2A CN116771833A (en) | 2023-08-11 | 2023-08-11 | Textured surface of flat-head V-shaped groove and friction pair |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311012613.2A CN116771833A (en) | 2023-08-11 | 2023-08-11 | Textured surface of flat-head V-shaped groove and friction pair |
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| CN116771833A true CN116771833A (en) | 2023-09-19 |
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| CN202311012613.2A Pending CN116771833A (en) | 2023-08-11 | 2023-08-11 | Textured surface of flat-head V-shaped groove and friction pair |
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| Country | Link |
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| CN (1) | CN116771833A (en) |
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- 2023-08-11 CN CN202311012613.2A patent/CN116771833A/en active Pending
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